Ventilator



Oct. 16, 1928.

A. O. MILLER VENTILATOR Filed March 30, 1927 Patented Oct. 16, 1928.

UNITED STATES PATENT OFFICE.

ALLEN O. MILLER, OF SEATTLE, WASHINGTON.

VENTILATOR.

Application filed March 3Q, 1927. Serial No. 179,586.

and is operable for the purpose of drivingair into or for drawing airfrom a room through said opening.

The principal object of the present invention is to provide a ventilatorof the above character wherein the fan blower is fixed on the shaft of adriving motor that is mounted by a revoluble support to which means isconnected for adjusting it to different positions at which the fan willoperate to force air into or draw it from the room.

Another object of the invention is to provide a longitudinallyadjustable casing for the fan and motor, that adapts it for use in wallsof different thicknesses.

A still further object is to provide means of a novel character forreversing the position of the motor and fan for the purpose of reversingthe direction of the air current through the opening in which the fan islocated.

In accomplishing these and other objects of the, invention, I haveprovided the improved details of construction, the preferred forms ofwhich are illustrated in the accompanying drawings, wherein Figure 1 isa vertical, sectional view through a wall opening in which a ventilatormechanism embodied by the present invention is located. 7

Figure 2 is an end view of the same.

Figure 3 is a horizontalsection taken on the line 3-3 in Figure 1,illustrating the bearing in which the motor support revolves and themeans whereby the support is limited in its rotative movement.

Referring more in detail to the drawings ledesignates a building wallhaving an opening 2 therein that is lined with a sheet metal thimblecomprising inner and outer sections 3 and 4; these sections, at theirinner ends, being fitted telescop-ically one within the other in orderthat the length of the thimble may be adjustedin accordance with thethickness of the wall in which it is used, and, at their outer ends,the'sections have integrally formed collars 5 and 6 of an ornamentalcharacter adapted to fit flatly against the inner and outer surfaces. ofthe wall about the opening 2.

Fixed vertically within the thimble at the bottom of section 3, is atubular bearing 7 in which-a, post 8 is revolubly supported by means ofa collar 9 that is formed about its upper end, and which seats upon the11 per end of the hearing. The upper end 0 the post is provided with alaterally turned arm 10 on which a. small electric motor 11 is mounted;the motor casing having a de pending lug 12 at its under side that isfixed to the end of the arm 10 by means of a bolt 13 extended throughthe arm and through the lug, with a nut 14 threaded thereon to securethe parts together.

The motor is supported coaxially of the thimble and fixed on the motorshaft 15 is a blower fan 16. The motor is of that type that revolves inone direction only and it is connected electrically to a sourceofelectricity by means of the circuit wires 17 and '18 which extend fromthe motor through an opening 20"at the base of the thimble. The motorand fan are contained entirely within the thimble opening and the fan isof such diameter that its position within the thimble may be reversed byrotative movement of the motor support without its blade coming incontact with the thimble.

Fixed rigidly to the lower end of the post 8, which mounts the motor, isadownwardly extending metal strap 21' that is given a spiral twist ofone hundred. and eighty degrees, and fixed to the bearing member 7 andextending downwardly'therefrom, is a bracket 22 to which a lever 23 ispivotally attached by means of a pin'24; One end of this lever extendsfrom the wall and at its'outer end is provided with a gripping piece 26whereby the lever may be actuated upwardly or downwardly, and at itsinner end the lever has a slot 27 that receives the twisted plateslidably, but not rotatably,j therein. If the motor and fan are in thepositions as shown in full lines in Figure 1, and it is desired toreverse the direction of the air current delivered through the openingby the operation of the fan, the lever is pressed downwardly so that itsinner end moves upwardly on the spiral strip, causing the latter to berevolved through an arc of one hundred and eighty degrees, therebyreversing the position of the fan and motor to the positions in whichthey are shown in dotted lines in Figure 1. The'rot'ative movement ofthe mounting post of the motor is limited by mean of a pin 28 that isflied in the post sufficient length to permit movement of the postthrough a one-half turn. r A hood or canopy of a suitable character, asdesignated at 31, may be fixed to the outside of the wall over theopening as a means of preventing rain from falling into the thimbleopening. Also, a suitable door, as at 33, may be hingedly fixed to theinside of the thimble to close the opening when this is desired.

Assuming the device to be so constructed, with the motor in the positionshown in full lines in Figure 1, air willbe driven by the fan into theroom. When it is desired to exhaust air from the room, the position ofthe fan-and motor are reversed by pressing downwardly on the thumbpieceof the lever, thus causing its slotted end to travel up on the spiralplate causing it to rotate and direction of the fan to be reversed sothat the airis driven in the opposite direction.

Having thus described my invention, what I claim as new therein anddesire to secure by Letters-Patent, is: a

1. A ventilator comprising a thimble applicable to a wall opening,amotor sup- 5 portlng means rotatably fixed within the thimble, a motormounted by said supporting means, a fan fixed to the motor shaft fordriving an air current through the thimble and a lever connected withthe supporting means operable from without the thimble for reversing theposition of the motor support and motor as a means 'of reversing thedirection of'the air current.

2. A ventilator comprising a thimble applicable to a wall opening, abearing sleeve fixed to the thimble wall, a post rotatably mounted inthe bearin a motor supported within the thimble frdih the inner end ofthe post, a fan fixed to the motor shaft and operable thereby fordriving an air current through the thimble, and a lever connected withthelower end of the post and operable from outside the thimbleforrotating the post to reverse the position of the motor as a means ofreversing the direction of the air current through the thimble.

3. A ventilator comprising a thimble that is applicable to a wallopening, a bearing sleeve fixed to the thimble wall, a post rotatablymounted in said bearing with one end extending into the thimble and itsother end extending outside the thimble wall and terminating in aflattened, spirally twisted shank, a motor mounted by the inner end ofthe post, a fan fixed to the motor shaft and operable thereby to drivean air current through the thimble, a pivotally supported lever havingits inner end slotted to slidably recelve the flattened shank and itsopposite end providing an actuating portion whereby the slotted end ofthe lever may be made to ing the direction of the air travel lengthwiseof the shank to cause it to be rotated for the purpose of reversing theposition of the motor as a means of changcurrent through the thimble.

4. A ventilator comprising a thimble that sleeve fixed to the thimblewall, a post rotatably mounted in the bearing with one end extendinginto the thimble and its other end I extending outside the thimble walland tercaused to travel along the spiral shank to cause it to be rotatedas a means of reversing the position of the motor as a means of changingthe direction of the air current.

5. A ventilator comprising a thimble that .is applicable ,to a wallopening, a bearing sleeve fixed to the thimble wall, a post rotatablymounted in the bearing with one end extending into the thimble and itsother end extending outside the thimble wall and terminating in aspirally twisted, flattened shank, a motor mounted on the inner end ofthe post, a fan fixed to the motor shaft and operable thereby to drivean air current -ininating in a spirally twisted, flattened' through thethimble, a bracket fixed to the thimble wall at the outside thereof, alever pivotally mounted on the bracket having a i slotted end slidablyreceiving the spiral shank .and having an actuating outer end portionwhereby the slotted end may be caused to travel along the spiral shankto cause it to be rotated as a means of reversing the position of themotoras a means of.

the post in opposite directions so that the shaft of the motor willbecoaxial of the thimble when at either limit.

6. A ventilator comprising a th mble that i through the thimble, abracket fixed to the thimble wall at the outside thereof, a leverpivotally mounted on the bracket having a slotted end slidably receivingthe spiral shank and having an actuating, outer end portion whereby theslotted end may be caused to travel along the spiral shank to slot andadapted to limit the rotative movecause it to be rotated as a meansofrevers- .ment of the post in opposite directions so ing the positionof the motor as a means of that the motor shaft will be coaxial of the10 changing the direction of the air current, thimble when at eitherlimit.

said bearing sleeve having a circumferen- Signed at Seattle, Washington,this 5th tially directed slot therein and said post havday of March,1927. I

ing a pin fixed therein and movable in said ALLEN O. MILLER.

